A 48-year-old businessman, presents at the emergency room with a 12-day history of headache, myalgia, nausea, and vomiting. Patient history reveals that the patient is a consulting engineer for the tropical area. On his latest trip, he failed to take his prophylaxis for malaria. According to his general physician’s records, all his immunizations are up to date. His fever was 39°C at the time of initial examination, but alternated with periods of extreme cold and cyanosis. A complete blood count was ordered, along with parasite examination and urinalysis.

A 48-year-old businessman, presents at the emergency room with a 12-day history of headache, myalgia, nausea, and vomiting. Patient history reveals that the patient is a consulting engineer for the tropical area. On his latest trip, he failed to take his prophylaxis for malaria. According to his general physician’s records, all his immunizations are up to date. His fever was 39°C at the time of initial examination, but alternated with periods of extreme cold and cyanosis. A complete blood count was ordered, along with parasite examination and urinalysis.

1. What parasite do you suspect?
2. Which morphological factor will be important in deciding the species of this organism? Which morphological form you may observe in the peripheral blood of this patient?
3. How did the patient contract this parasitic infection?
4. Why this species can cause much more serious result than other species among this organism?
5. Please list name of three parasites that lead to anemia as the main symptoms, and their infective stage and pathogenic stage, and which is their route to entry human being. What is the different mechanism of anemia caused by these parasites?